package com.example.sss.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class RequestInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        HttpSession session = request.getSession();

        Object username = session.getAttribute("username");

        System.out.println("===============>>>>>>当前uri：" + request.getRequestURI());
        System.out.println("===============>>>>>>当前username: " + username);

        if (username == null) {
            System.out.println("未登录，请先登录");
            response.sendRedirect(request.getContextPath() + "/login/toLogin");
            return false;
        } else {
            System.out.println("已登陆，放行");
            return true;
        }
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }

}
